Electrode and method of manufacturing electrode

Abstract

An electrode includes: a current collector that is made of a conductive material; a mixture layer that contains an active material and is arranged on one surface of the current collector; a thermoplastic resin particle layer in which a plurality of insulating thermoplastic resin particles are arranged on the mixture layer; and a porous inorganic oxide particle layer that contains plural insulating inorganic oxide particles and is arranged on an edge surface of a laminate including the current collector, the mixture layer, and the thermoplastic resin particle layer. A melting point of the inorganic oxide particles is higher than a melting point of the thermoplastic resin particles.

What is claimed is: 
     
       1. An electrode comprising:
 a current collector that is made of a conductive material; 
 a mixture layer that contains an active material and is arranged on one surface of the current collector; 
 a thermoplastic resin particle layer in which a plurality of insulating thermoplastic resin particles are arranged on the mixture layer; 
 wherein the current collector, the mixture layer, and the thermoplastic resin particle layer are arranged as a laminate and layered in a laminating direction; and 
 a porous inorganic oxide particle layer that contains a plurality of insulating inorganic oxide particles having a higher melting point than the thermoplastic resin particles, the porous inorganic oxide particle layer being disposed on an edge surface of the laminate, the edge surface being parallel to the laminating direction, so that the porous inorganic oxide particle layer disposed on the edge surface of the laminate has a higher melting point than the thermoplastic resin particle layer arranged on the mixture layer. 
 
     
     
       2. The electrode according to  claim 1 , wherein
 the electrode is a positive electrode. 
 
     
     
       3. The electrode according to  claim 1 , wherein
 the inorganic oxide particle layer has a wall shape covering an entire region of the edge surface. 
 
     
     
       4. The electrode according to  claim 1 , wherein
 the current collector has an exposure portion in which the mixture layer is not arranged, and 
 in the laminate, the edge surface is on a side opposite to a side where the exposure portion is present. 
 
     
     
       5. The electrode according to  claim 1 , wherein the porous inorganic oxide particle layer does not include the thermoplastic resin particles.